<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <style>
         /*   body,div,p,form,h1,h2,h3,h4,h5,h6{
                margin:0px;
                padding:0px;
            }
            */

            *{
                padding:0px;
                margin:0px;
            }
            div{
                width:200px;
                height: 200px;
                border:1px solid red;
            }
            p{
                width:300px;
                height: 200px;
                border:1px solid blue;
            }
        </style>
    </head>
    <body>
        <div></div>
        <p></p>
    </body>
</html>